Originally Posted by
BuddhistGirafe Anyway. I only ever leave Phone, SMS, Email
You can't kill these apps, just remove them from the fast app switcher bar. I guess technically it's kind of killing them, but they automatically open back up a microsecond after closing.
As marketsqhero said, almost no apps in the fast task switcher are running, and most aren't even using the saved state (which doesn't use battery anyway). There are certain times when it makes sense to quit if there is a buggy app, but that's about it.
A trick for those of you with OCD, you can close more than one app at a time. When they are bouncing around down there, if your fingers are small enough, you can close 2 or 3 at a time by taping the (-) on more than one...enjoy!
